Question :
I said to my wife: "You are forbidden to me in bed as is my sister." What is the ruling of Sharia on this?
The Answer :
All perfect praise be to Allah the Lord of the Worlds. May His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
You have to fast for two consecutive months before having an intercourse with her. If you can`t, then you have to feed sixty poor persons; a meal for each that is equal half a JD. And Allah The Almighty Knows Best.